US4426869A - Radial infeed thread roll attachment - Google Patents

Radial infeed thread roll attachment Download PDF

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Publication number
US4426869A
US4426869A US06/383,477 US38347782A US4426869A US 4426869 A US4426869 A US 4426869A US 38347782 A US38347782 A US 38347782A US 4426869 A US4426869 A US 4426869A
Authority
US
United States
Prior art keywords
outer portion
inner portion
cam
axially
cam assembly
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US06/383,477
Inventor
Robert M. Farmer
Brian R. Faucher
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
QUAMCO Inc 100 CONSTITUTION PLAZA SUITE 1560 HARTFORD CT 06103 A DE CORP
Western Atlas Inc
Original Assignee
Litton Industrial Products Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Litton Industrial Products Inc filed Critical Litton Industrial Products Inc
Assigned to LITTON INDUSTRIAL PRODUCTS, INC. reassignment LITTON INDUSTRIAL PRODUCTS, INC. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: FARMER, ROBERT M., FAUCHER, BRIAN R.
Priority to US06/383,477 priority Critical patent/US4426869A/en
Priority to JP57181506A priority patent/JPS58215233A/en
Priority to GB08234431A priority patent/GB2121335B/en
Priority to DE19823245266 priority patent/DE3245266A1/en
Publication of US4426869A publication Critical patent/US4426869A/en
Application granted granted Critical
Assigned to QUAMCO, INC., 100 CONSTITUTION PLAZA, SUITE 1560 HARTFORD, CT. 06103 A DE CORP. reassignment QUAMCO, INC., 100 CONSTITUTION PLAZA, SUITE 1560 HARTFORD, CT. 06103 A DE CORP. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: LITTON INDUSTRIAL PRODUCTS, INC.
Assigned to LITTON INDUSTRIAL PRODUCTS, INC., A CORP OF DE reassignment LITTON INDUSTRIAL PRODUCTS, INC., A CORP OF DE SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: QUAMCO, INC.
Assigned to LITTON INDUSTRIAL AUTOMATION SYSTEMS, INC. reassignment LITTON INDUSTRIAL AUTOMATION SYSTEMS, INC. MERGER (SEE DOCUMENT FOR DETAILS). 7-23-85 Assignors: KIMBALL SYSTEMS, INC., LITTON DATAMEDIX, INC., LITTON INDUSTRIAL PRODUCTS INC.
Assigned to CONNECTICUT BANK & TRUST COMPANY, N.A., 100 CONSTITUTION PLAZA reassignment CONNECTICUT BANK & TRUST COMPANY, N.A., 100 CONSTITUTION PLAZA SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: QUAMCO, INC.
Assigned to HELLER FINANCIAL, INC. reassignment HELLER FINANCIAL, INC. SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: QUAMCO, INC., A CORP. OF DE
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H3/00—Making helical bodies or bodies having parts of helical shape
    • B21H3/02—Making helical bodies or bodies having parts of helical shape external screw-threads ; Making dies for thread rolling
    • B21H3/04—Making by means of profiled-rolls or die rolls
    • B21H3/042—Thread-rolling heads
    • B21H3/048—Thread-rolling heads working tangentially
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/18—Mechanical movements
    • Y10T74/18888—Reciprocating to or from oscillating
    • Y10T74/1892—Lever and slide
    • Y10T74/1896—Cam connections

Definitions

  • Radial infeed thread rolling offers the advantage of balanced loading of the work and minimizes spindle loads. It also allows rolling at greater distances from the work holding collet. Many radial infeed thread rolling attachments accommodate limited ranges of stock sizes. Other thread rolling attachments expand their stock size range through the use of a large number of adjustment cams. There exists a need for an expanded range, continuously adjustable thread rolling attachment which employs a limited number of cams and provides an actuation system with a stiffness and penetration control consistent with the roll form process.
  • a radial infeed thread roll attachment is comprised of a pair of pivoting, jaw mounted roll form dies which are operated by a high pressure hydraulic cylinder and which can be adjusted during machine operation to accommodate various stock sizes and to change roll depth.
  • Another object of the invention is to provide a thread rolling attachment which is continuously adjustable throughout the range of each of the cams.
  • a further object of the invention is to provide a thread rolling attachment which is actuated by means of a high pressure hydraulic cylinder.
  • FIG. 1 is an outline drawing of the radial infeed thread roll attachment.
  • FIG. 2 is a sectional view of the cam assembly.
  • FIG. 3 is a perspective sectional view of the cam assembly.
  • the radial infeed thread roll attachment 1 is comprised of roll form dies 3 mounted to the jaws 2 which rotate about pivots 10.
  • the jaws 2 are caused to rotate and functionally activate the roll form dies 3 by the axial motion of the wedge-shaped cam 6.
  • the cam 6 is part of a cam assembly which is made up of the cam 6, cam clevis pin 7, cam assembly inner portion 8, and cam assembly outer portion 9, all of which are suitably contained in the housing 5.
  • the cam assembly inner portion 8 is attached to the power cylinder 15 through the power cylinder output shaft 16 and secured by means of the power cylinder attachment nut 14.
  • the attachment nut 14 is completely enclosed in the chamber 14a which is created by the assembly of the inner portion 8 and the outer portion comprised of an inner axially displaceable element 9 and an outer axially fixed element 12.
  • the cam assembly inner portion is also attached to the cam 6 through the cam clevis pin 7.
  • Axial stroking of the power cylinder causes the cam 6, acting through the rollers 4, to rotate the jaws 2 about the jaw pivots 10.
  • the jaw return spring 11 opens the jaws as the cam 6 withdraws from the rollers 4.
  • the jaw return spring, acting through the rollers 4, also prevents rotation of the cam assembly inner portion when rotating the cam assembly adjusting ring 12.
  • the keyway 17 of ring 12 through key 17a interconnects the ring to the cam assembly outer portion 9. Rotational displacement of the cam assembly outer portion 9 by means of the adjusting ring 12 axially displaces the inner portion 8 relative to the outer portion 9.
  • the power cylinder 15 axially displaces the cam assembly from an advanced position (illustrated in FIG. 2) to a retracted position (illustrated in FIG. 3) without imparting any rotational displacement to either the outer portion 9 or the inner portion 8.
  • the power cylinder 15 axially displaces the cam assembly a distance equal to the full stroke of the power cylinder over the complete range of size adjustment effected by the cam assembly.
  • the power cylinder 15 is hydraulically powered, and in order to create a thread rolling attachment whose stiffness and penetration control is consistent with the thread rolling process, the power cylinder is furnished hydraulic fluid at about 1200 to 1300 psi from an air-on-oil hydraulic booster 19, or from other suitable hydraulic means.
  • cam 6 can be readily removed and replaced to provide for other ranges of stock sizes by aligning cam clevis pin 7 with the aperture 13 in the housing 5 and removing the pin 7 and replacing the cam 6 and pin 7.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Transmission Devices (AREA)
  • Screw Conveyors (AREA)

Abstract

A radial infeed thread roll attachment comprising a pair of jaw elements each having a thread roll mounted at one end and a roller secured on the other end, a housing, pivotally mounting the jaw elements in opposed relation thereon, a cam assembly mounted on the housing and having an inner portion having a wedge-shaped cam element at one end and a threaded member at the other end and an outer portion, a spring for forcefully maintaining the rollers in engagement with the cam element for preventing the rotation of the inner portion when the outer portion is rotated whereby rotation of the outer portion will result in the axial displacement of the inner portion relative to the outer portion, the outer portion having an outer axially fixed element and an inner axially displaceable element threadedly related to the inner portion threaded member, the outer element having an axially extending keyway and the inner element having an axially extending key, a hydraulic cylinder with an air-on-oil hydraulic booster or other suitable hydraulic source, the cylinder being secured to the inner element for axially displacing the inner element and the threadedly related inner portion a fixed distance between a retracted and an advanced position with no rotational displacement therebetween.

Description

BACKGROUND OF THE INVENTION
Radial infeed thread rolling offers the advantage of balanced loading of the work and minimizes spindle loads. It also allows rolling at greater distances from the work holding collet. Many radial infeed thread rolling attachments accommodate limited ranges of stock sizes. Other thread rolling attachments expand their stock size range through the use of a large number of adjustment cams. There exists a need for an expanded range, continuously adjustable thread rolling attachment which employs a limited number of cams and provides an actuation system with a stiffness and penetration control consistent with the roll form process.
SUMMARY AND OBJECTS OF THE INVENTION
According to the invention, a radial infeed thread roll attachment is comprised of a pair of pivoting, jaw mounted roll form dies which are operated by a high pressure hydraulic cylinder and which can be adjusted during machine operation to accommodate various stock sizes and to change roll depth.
It is, therefore, an object of the invention to provide a radial infeed thread roll attachment.
It is a further object of the invention to provide a thread rolling attachment which by virtue of the constant length of stroke of its actuating cylinder, and through the use of a small family of easily changed wedges or cams, is capable of rolling a wide range of thread sizes.
Another object of the invention is to provide a thread rolling attachment which is continuously adjustable throughout the range of each of the cams.
It is also an object of the invention to provide a thread rolling attachment which can be adjusted while its host machine is operating, adjustments being made between actual thread rolling cyles.
A further object of the invention is to provide a thread rolling attachment which is actuated by means of a high pressure hydraulic cylinder.
Other objects and advantages of the present invention will become apparent from the following portion of the specification and from the accompanying drawings which illustrate, in accordance with the mandate of the patent statutes, a presently preferred embodiment incorporating the principles of the invention.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is an outline drawing of the radial infeed thread roll attachment.
FIG. 2 is a sectional view of the cam assembly.
FIG. 3 is a perspective sectional view of the cam assembly.
DESCRIPTION OF THE PREFERRED EMBODIMEMT
As illustrated in FIG. 1, the radial infeed thread roll attachment 1 is comprised of roll form dies 3 mounted to the jaws 2 which rotate about pivots 10. The jaws 2 are caused to rotate and functionally activate the roll form dies 3 by the axial motion of the wedge-shaped cam 6.
Referring now to FIGS. 2 and 3, the cam 6 is part of a cam assembly which is made up of the cam 6, cam clevis pin 7, cam assembly inner portion 8, and cam assembly outer portion 9, all of which are suitably contained in the housing 5. The cam assembly inner portion 8 is attached to the power cylinder 15 through the power cylinder output shaft 16 and secured by means of the power cylinder attachment nut 14. The attachment nut 14 is completely enclosed in the chamber 14a which is created by the assembly of the inner portion 8 and the outer portion comprised of an inner axially displaceable element 9 and an outer axially fixed element 12. The cam assembly inner portion is also attached to the cam 6 through the cam clevis pin 7. Axial stroking of the power cylinder causes the cam 6, acting through the rollers 4, to rotate the jaws 2 about the jaw pivots 10. The jaw return spring 11 opens the jaws as the cam 6 withdraws from the rollers 4. The jaw return spring, acting through the rollers 4, also prevents rotation of the cam assembly inner portion when rotating the cam assembly adjusting ring 12.
Axial adjustment of cam 6, which determines the closed position of the rollers 4 after stroking the power cylinder 15, is made by means of the cam assembly adjusting ring 12. The keyway 17 of ring 12 through key 17a interconnects the ring to the cam assembly outer portion 9. Rotational displacement of the cam assembly outer portion 9 by means of the adjusting ring 12 axially displaces the inner portion 8 relative to the outer portion 9.
The power cylinder 15 axially displaces the cam assembly from an advanced position (illustrated in FIG. 2) to a retracted position (illustrated in FIG. 3) without imparting any rotational displacement to either the outer portion 9 or the inner portion 8. The power cylinder 15 axially displaces the cam assembly a distance equal to the full stroke of the power cylinder over the complete range of size adjustment effected by the cam assembly. The power cylinder 15 is hydraulically powered, and in order to create a thread rolling attachment whose stiffness and penetration control is consistent with the thread rolling process, the power cylinder is furnished hydraulic fluid at about 1200 to 1300 psi from an air-on-oil hydraulic booster 19, or from other suitable hydraulic means.
The cam 6 can be readily removed and replaced to provide for other ranges of stock sizes by aligning cam clevis pin 7 with the aperture 13 in the housing 5 and removing the pin 7 and replacing the cam 6 and pin 7.

Claims (3)

What is claimed is:
1. A radial infeed thread roll attachment comprising
a pair of jaw elements each having means for mounting a thread roll at one end and a roller secured on the other end,
a housing,
means for pivotally mounting said jaw elements in opposed relation on said housing,
a cam assembly having an inner portion having a flat wedge-shaped cam element at one end and a threaded member at the other end and an outer portion,
means for mounting said cam assembly on said housing,
spring means for forcefully maintaining said rollers in engagement with said cam element for preventing the rotation of said inner portion when said outer portion is rotated whereby rotation of said outer portion will result in the axial displacement of said inner portion relative to said outer portion,
said outer portion having an outer axially fixed element and an inner axially displaceable element threadedly related to said inner portion threaded member, said outer element having an axially extending keyway and said inner element having an axially extending key, and
cylinder means including a hydraulic cylinder with an air-on-oil hydraulic booster,
means for securing said cylinder means to said inner element for axially displacing said inner element and said threadedly related inner portion a fixed distance between a retracted and an advanced position with no rotational displacement therebetween.
2. A radial infeed thread roll attachment according to claim 1, where said cam assembly allows an actuating hydraulic cylinder to maintain its full stroke over the entire size adjustment range of said cam assembly.
3. A radial infeed thread roll attachment according to claim 1, wherein said cam assembly inner portion threaded member includes a chamber for receiving a portion of said securing means.
US06/383,477 1982-06-01 1982-06-01 Radial infeed thread roll attachment Expired - Fee Related US4426869A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US06/383,477 US4426869A (en) 1982-06-01 1982-06-01 Radial infeed thread roll attachment
JP57181506A JPS58215233A (en) 1982-06-01 1982-10-18 Radial feed-in screw rolled attachment
GB08234431A GB2121335B (en) 1982-06-01 1982-12-02 Radial infeed thread roll attachment
DE19823245266 DE3245266A1 (en) 1982-06-01 1982-12-07 THREAD ROLLER APPROACH WITH RADIAL ADJUSTMENT

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/383,477 US4426869A (en) 1982-06-01 1982-06-01 Radial infeed thread roll attachment

Publications (1)

Publication Number Publication Date
US4426869A true US4426869A (en) 1984-01-24

Family

ID=23513342

Family Applications (1)

Application Number Title Priority Date Filing Date
US06/383,477 Expired - Fee Related US4426869A (en) 1982-06-01 1982-06-01 Radial infeed thread roll attachment

Country Status (4)

Country Link
US (1) US4426869A (en)
JP (1) JPS58215233A (en)
DE (1) DE3245266A1 (en)
GB (1) GB2121335B (en)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4617816A (en) * 1985-02-05 1986-10-21 C. J. Winter Machine Works Thread rolling attachment
US4677744A (en) * 1984-03-27 1987-07-07 General Electric Company Apparatus for assembling a rotatable assembly
WO1997013618A1 (en) * 1995-10-13 1997-04-17 Buck David A Improved back-up power tongs
US5904075A (en) * 1996-10-11 1999-05-18 Buck; David A. Interlocking jaw power tongs
US5937694A (en) * 1998-03-03 1999-08-17 Mueller; Tom Portable cam actuated clinching, crimping and punching press
US6202461B1 (en) * 1999-02-03 2001-03-20 C. J. Winter Machine Technologies, Inc. Tangential thread rolling head
US6334641B1 (en) * 1999-02-06 2002-01-01 Mirae Corporation Gripper for a surface mounting apparatus
US20060162412A1 (en) * 2005-01-27 2006-07-27 Mmc Automation Inc. Swaging head assembly
US20060272381A1 (en) * 2005-06-03 2006-12-07 Fci Americas Technology, Inc. Hand-held, portable, battery-powered hydraulic tool
US20070214860A1 (en) * 2002-04-10 2007-09-20 Egbert Frenken Electrohydraulic pressing device and method for operating same
US20080016939A1 (en) * 2004-07-02 2008-01-24 Egbert Frenken Pair of pressing jaws for hydraulic or electric pressing tools
US20110113851A1 (en) * 2006-09-07 2011-05-19 Egbert Frenken Pair of pressing jaws for hydraulic or electric pressing tool
US8783079B2 (en) 2008-04-17 2014-07-22 Gottfried Wilhelm Leibniz Universitaet Hannover Device and non-cutting shaping method for introducing an outside profile into a workpiece
US20160067761A1 (en) * 2014-09-08 2016-03-10 Viega Gmbh & Co. Kg Pressing tool with switchable bistable tensioning mechanism
CN105499452A (en) * 2016-02-05 2016-04-20 杭州富尔顿热能设备有限公司 Ripple pressing machine
US10369677B2 (en) * 2013-03-05 2019-08-06 Knust-Godwin Llc Screw thread roller burnishing apparatus

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0270346A (en) * 1988-09-05 1990-03-09 Nachi Fujikoshi Corp Method and device for forming groove on outside peripheral surface of shaft to be rolled
US6748779B2 (en) * 2002-09-30 2004-06-15 C.J. Winter Machine Technologies, Inc. Tangential rolling attachment for a machine tool
JP4317879B2 (en) 2007-01-29 2009-08-19 三菱重工業株式会社 Positioning method of moving body

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2438784B2 (en) * 1974-08-13 1976-10-28 Abele, Jürgen, 7301 Scharnhausen ROLLER HEAD FOR PROFILING CYLINDRICAL WORKPIECES
DE2944999C2 (en) * 1979-11-08 1982-11-25 Wilhelm Fette Gmbh, 2053 Schwarzenbek Tangential rolling head

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4677744A (en) * 1984-03-27 1987-07-07 General Electric Company Apparatus for assembling a rotatable assembly
US4617816A (en) * 1985-02-05 1986-10-21 C. J. Winter Machine Works Thread rolling attachment
WO1997013618A1 (en) * 1995-10-13 1997-04-17 Buck David A Improved back-up power tongs
US5671961A (en) * 1995-10-13 1997-09-30 Buck; David A. Back-up power tongs
US5702139A (en) * 1995-10-13 1997-12-30 Buck; David A. Back-up power tongs
US5904075A (en) * 1996-10-11 1999-05-18 Buck; David A. Interlocking jaw power tongs
US5937694A (en) * 1998-03-03 1999-08-17 Mueller; Tom Portable cam actuated clinching, crimping and punching press
US6202461B1 (en) * 1999-02-03 2001-03-20 C. J. Winter Machine Technologies, Inc. Tangential thread rolling head
US6334641B1 (en) * 1999-02-06 2002-01-01 Mirae Corporation Gripper for a surface mounting apparatus
US20070214860A1 (en) * 2002-04-10 2007-09-20 Egbert Frenken Electrohydraulic pressing device and method for operating same
US7412868B2 (en) 2002-04-10 2008-08-19 Gustav Klauke Gmbh Electrohydraulic pressing device and method for operating same
US20080016939A1 (en) * 2004-07-02 2008-01-24 Egbert Frenken Pair of pressing jaws for hydraulic or electric pressing tools
US7140219B2 (en) * 2005-01-27 2006-11-28 Mmc Automation Inc. Swaging head assembly
US20060162412A1 (en) * 2005-01-27 2006-07-27 Mmc Automation Inc. Swaging head assembly
US20060272381A1 (en) * 2005-06-03 2006-12-07 Fci Americas Technology, Inc. Hand-held, portable, battery-powered hydraulic tool
US7464578B2 (en) 2005-06-03 2008-12-16 Fci Americas Technology, Inc. Hand-held, portable, battery-powered hydraulic tool
US20110113851A1 (en) * 2006-09-07 2011-05-19 Egbert Frenken Pair of pressing jaws for hydraulic or electric pressing tool
US8336362B2 (en) 2006-09-07 2012-12-25 Gustav Klauke Gmbh Pair of pressing jaws for hydraulic or electric pressing tool
US8783079B2 (en) 2008-04-17 2014-07-22 Gottfried Wilhelm Leibniz Universitaet Hannover Device and non-cutting shaping method for introducing an outside profile into a workpiece
US10369677B2 (en) * 2013-03-05 2019-08-06 Knust-Godwin Llc Screw thread roller burnishing apparatus
US11426835B2 (en) 2013-03-05 2022-08-30 Knust-Godwin Llc Screw thread roller burnishing apparatus
US20160067761A1 (en) * 2014-09-08 2016-03-10 Viega Gmbh & Co. Kg Pressing tool with switchable bistable tensioning mechanism
US10399138B2 (en) * 2014-09-08 2019-09-03 Viega Technology Gmbh & Co. Kg Pressing tool with switchblade bistable tensioning mechanism
CN105499452A (en) * 2016-02-05 2016-04-20 杭州富尔顿热能设备有限公司 Ripple pressing machine

Also Published As

Publication number Publication date
DE3245266A1 (en) 1983-12-01
GB2121335A (en) 1983-12-21
JPS58215233A (en) 1983-12-14
GB2121335B (en) 1985-07-17

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AS Assignment

Owner name: LITTON INDUSTRIAL PRODUCTS, INC. HOLDEN, MA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNORS:FARMER, ROBERT M.;FAUCHER, BRIAN R.;REEL/FRAME:004011/0197

Effective date: 19820525

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